I'm having trouble with svn 1.3.0; when doing a major commit with
hundreds of changed files, I am getting the error:

Can't open file 'C:\pub\subversion\db\transactions\724-4.txn\changes':
The process cannot access the file because it is being used by another
process.

Each time I try, the revision directory's suffix increments (this time
it was \724-4.txn\changes; next time it will be \724-5.txt\changes).

The error seems to occur at the very end of the commit process. I've
tried doing a cleanup of the repository, and stopping and starting the
subversion server, to no avail. Has anyone seen this? Heeeeelp!